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《科学》 第391卷 第6784期 · 2026年1月29日 · 中文解读

土壤驱动陆生植物维管张力调控的趋同演化

Soils drive convergence in the regulation of vascular tension in land plants · A. Carminati et al.
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这篇讲什么
本文通过荟萃分析发现,陆生植物在叶片维管张力达到约1.3兆帕时启动气孔调节蒸腾,这一阈值与土壤水分提取最优模型预测的范围一致,表明土壤物理约束驱动了植物维管张力调控的趋同。
原文开头
Andrea Carminati1*, Mathieu Javaux2,3, Fabian J.P. Wankmüller1, Timothy J. Brodribb4* Terrestrial vascular plants operate under negative water potential, which results in hydraulic tension in the vascular system. Vascular tension varies with transpiration and soil drying and is regulated by stomata, pressure- activated valves on the leaf surface. We hypothesize that soil physical constraints drive convergence in the operational range of leaf vascular tension. Based on a meta analysis of 19 diverse species, we find that stomatal regulation of transpiration is activated when leaf vascular tension reaches a narrow target of 1.3 ± 0.6 megapascals. This value matches the range (1.4 ± 0.6 megapascals) predicted from an optimal soil water extraction model. …
摘自《科学》(Science)第391卷 第6784期 · 2026年1月29日,A. Carminati et al.。仅引用开头一小段供了解文章,版权归原刊所有,全文请阅读原刊。
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